Furnace-feeding device.



PATENTED JULY 2, 1907.

H P. TIPPETT. URNACE FEEDING DEVICE. APPLZOATION FILED 211113.26, 1906.

3 SHEETS-SHEET l.

ATTORNEYS Y PATENTED JULY 2, 1907,

H. P. TIPPETT. FURNACE FEEDING DEVICE.

APPLICATION TILED MAR.26,1906.

3 SHEETSSHBET 2 INVENTOR BY I w m/gza PATENTBD JULY 2, 1907. P, TIPPETT.

FURNACE FEEDING DEVICE.

APPLICATION FILED MAR. 26, 1906.

3 SHEETS-SHEET 3.

Y 4 momma.

mouth oi the iurnocc and for inte-wnittenlly discharging,

any desired mncunt of said furnace.

is the provision of simplo'zncuns for supplying cool to o. furnace in such manner as to continuously muintu. at the mouth oi the in i an unobstructed chute le furnace, the luel which l said chute icxrning an airscul to preserve the drult l the furnace.

A. further object of the invention is the provision oi improved nicer: ior continuously maintaining a supply of fuel zit the mouths of it plurality of furnaces and for al 1 nutcly admitting fluid under pressure to said lurnuccs in such mount-r115 to distribute it portion of said fuel over the grates.

A further ohjcct oi the invention is the provision of an improved blast for dischs. fuel into it furnace, together W! h menus for regulating both thei'orce and duration of said oi-est, said means permit-ting the regulation of the force or the blast independent of the duration thereof and also permitting the regulation of the dumtion oi the blust independent of the force-oi said blast. i I

further object of the invention is the provision of mace having improved coul receiving means, which may be adjusted to any desired angle to thereby a supply Oi fuel .cc, said means comprising ug inio the mouth of the direct the coal at :1 corresponding angle.

A further object of the invention is the provision of an improved blast for scattering fuel over the grates of o. furnace, together with means for mixing a certain amount ()l itil and steam with the products of combustion when said blast takes place.

Further objects and advantages oi the invention will be set forth in the detailed description which now follows. I

in the accompanying drawings: Figure l. is a front elevation of a. portion of a furnace having my invention applied thereto; Fig. 2 a vertical sect-ion upon line a: x of Fig. 1; Fig. 3 is a detail sectional view of a blast controlling valve hereinafter described; Fig. 4 is a do tail View of a worm wheel and trip finger hereinafter described; Fig. 5 is u horizonrul scction upon line y y of Fig. 2; Fig. 6 is detail plain view of :1 regulating door hereinafter described; Fig. 7 illustrates furnace feeding device embodying the prinhiplcs of my invention, secured to the plate which closes the mouth oi one of the furnaces of a Scotch marine boiler, said furnace Specification Letters Application filed liar-o Patented July 2, 3.905

26.1908. eriel'llo. 307,952.

feeding dovices lying entirely upon the exterior of the iurimee, and Fig. u Vc .czil section oi the parts illustrated in Fig. 7.

Like numerals designate corresponding of the figures of the drmvings.

.Rr wring to the dr: ngs the numeral 5 designates he lire box of a; .l'urnuc and o :Llcsignates the grates thereof. The opening 7 which forms the mouth of the furnace is adopted to be closed by a door 8. This door hinged to the usual door frame 5) by hinges 10 and is ports in all provided with the usual hitch ll and handle 12. A

hopper 13 is continued downwardly to form :1. chute l4, s d chute and hopper being secured to the lure of the furnace by braces 15. lo 16 which is slid-.iblydisposed in the chute servos to close Sitid chute Lind i'orins either a dznnpor or u incl retarding device as may be desired. An inclined portion 17 of tho (liuto is carried by 'Jli door and swings outwardly with said door when the latter is opened. A, incl receiving plate or table 18 is pivoted st 19 in the mouth of tho furnace and has its surface inclined slightly u uvurd I us is clearly illustinted in Fig. 2. A clmvnwurdly inclined portion 20 of this table rests upon the bottom oi the mouth oi the lurnucc and has a. series of perforations 21. formed thoroin. The space beneath this plate 18 is in (OllllllllillCzttlOIl with the ash pit 22 through on opening 23. A screw 2-1, the head of which is journulcdin the door i'rznnc t) is threaded into a sliding Wcdge 25 and is uduptcd to impiirt bodily movement to said wedge when turned. The upper face of tho wedge-.contzueis with the under iu-cc of the plate l8. It will he rcudily understood that by In oving the Wedge tlirou 'h tho medium ol the screw, the angle of the plate 18 may be readily adjusted. A nozzle 26 is located in tlio inouth oi the furnace dircctly beneath the mouth of the chute and is provided with a plurality of jet openings 27 whichuro directed in such manner as to throw 1' ucl to all parts oi the lire box as will be hereinafter described. Valves 28 control the [low of fluid to thesejet openings, there being one of these valves for each jet opening, so that the flow of fluidthrough each jet opening may be regulated indcpcndently of the flow of fluid through the other jet openings. It is it well known iact tlmu stcain boilers possess" individual characteristics, in other words, one boiler will burn fuel faster at one side of the grate th 111 at tho othcr, while in another boiler the reverse may be the case. By adjusting the valves 28. to through. the jet openings 27, the boiler may be accommodated.

peculiarities of each The amount of fuel thrown into the furnace will be.

1 wall of the chute, serve to retain. this Platte in position.

give the proper blast 55. These boll crank lovers are ,pivotcd as at 56 Pivotally mounted in bearings 32 is a. bell crank lever 33, one arm of which carries a pin 34 and the other arm of which is slotted lor the reception of apin 35 which passes through cars 36 carried by the plate 29. The pin 34 is adapted to engage recesses or openings ll) lormed in the wall of the portion l7 oi the chute. This hall crank lever provides means controllable from the extcrior oi the turn-ace for adjusting the degree to which the lower edge of the plate 29 projects below the upper wall of the chute and consetiuently determines the size of the pile of coal which lies upon the plate 18 and in front of the nozzle. Fluid under pressure and preferably steam, though air may be employed it desired, is supplied to the nozzle 26 through a pipe .17. An ordinary globe valve 38 controls the force of the blast through this pipe. For controlling the time and duration of the blast, I have provided the motor and valves shown at the left of F ig. 1. Fixed upon the shaft of the motor 39 which may be 01 any desired type, are worms ll. which mesh with and impart motion to worm gear wheels 42. Secured to the'laces of these worm gear wheels are sleeves 43 having angular openings 44 formed therethrough. Slidably disposed in thcsc angular openings are trip fingers 45 having their lower ends beveled as at 46. These trip lingers are internally threaded as at 47 for the reception of screws 48. Secured to the upper ends of these screws by pins 19 are disks 50 having openings 51 formed therein for the reception of a suitable tool. Lugs 52 which are carried by the worm gear wheels 42 overlie the upper portions ol the disks 50 and together with the screws and sleeves 43 hold said disks in place.

It will readily be understood that when rotation is imparted to the disks 50 by a tool inserted in the openings 51, the action of the screw 48 will move the finger 45 in the sleeve 43 to enable any desired adjustment of said finger to be secured, as will hereinalter be described. The beveled. ends of the trip fingers 45 are adapted to contact with the beveled upper ends 53 of the longer arms 54 of hell crank levers and have their short arms 57 secured to the upper ends of a valve stem 58, the movement of which controls the flow of lluid through the valve cas ng 59 aswill be presently set forth. Two of those controlling valves have been indicated at the left of Fig. 1, one of the valves controlling the flow of fluid to the furnace therein indicated, and the other of said valves controlling the flow of fluid through a pipe (30 and globe valve 61 to a companion furnace, indicated. A main steam supply pipe 62 communicates with a branch (33 leading to the controlling valve casings. Since both of these fluid controlling valves are alike in construc tion and operation, it is necessary to describe but one of them. A detail sectional view of this valve has been illustrated in Fig. 3 and by referring to said figure, it will be seen that the valve casing is provided with a chamber 64 which communicates with a somewhat smaller chamber (55. The branch 53 of the steam supply pipe is threaded into the casing at fill-and admits steam to the chamber 64. Mounted for reciprocatory movement in this chamber is a valvc which comprises a stem 67, a piston 68 carried by the upper end of said stem. and lilting snugly within tl .thamber ti t, and a son; hot smaller piston (39 which is carried upon the lower end of the stem and tits snugly within he chamber (55. The pipe 37 is threaded into the valve casing at 70. Steam passes from the pipe (33 to the chamber 64 through a port 71. A comparatively minute exhaust port 72 leads from the upper portion of the chamber 64 to the exterior of the valve casing. Mounted upon the lower end of the valve stem 58 is a valve 73 which is normally held upon its seat by a spring 74. This valve stem passes through a suitable stulling box 75 which is of the usual and well known construction and requires no further description. Steam passes to a chamber 76 in which the valve is located through a by-pass 77. Openings78 l()l'l1l('.(l through the door 8 per mit the passage of suitable implements. such as a slash bar or lire book through said door without open ing the same.

The operation ol' the device is as follows. Fuelbeing led into the chute l4 through the hopper 13 in any desired manner, rests in a pile upon the table l8 in front of the nozzles. The size of this pile may be determined by regulating the position of the plate .lSiis has been heroinbcl'ore described. The motor 339 having been set in motion, movement is impartc t to the wornr gear wheels 42. which rotate and carry the trip lingers 45 bodily around. \i'licn the beveled ends iii of those trip lingers (Ollllltjl with the beveled ends 53 of the bell crank lovers 55. said lit-ll crank levers are-rocked upon their pivots 5G to lil'tv the valve stems 58. This results in lifting the valves 7Zll'rom their seats. Since the area of the underside ol the piston 68 exceeds the area of the upper lace ol': the piston 69, it follows that the pressure in the chamber (S i will when the valve 73 is seated, hold the main valve in the position illustrattwl in Fig. which time communication between the chamber 4 and the pipe 157 is closed by the piston b9. When the valve 73 is lifted l'roiu its sea. against the tension oi the spring 74 in the course ol the rotation oi the flows through the byportion of the upper surl'ace pressure upon worm gear wheel. 12, steam pass 77 and chamber 76; to the upper chamber 64. The pressure upon lllt of the piston 68 combined with the the upper surface of the piston U9 is sutlit'icnt to 'Vtj? come the pressure upon the iiiidcrside of tho iuston (58 and causes the main valve to move tllDVllVl'i-tl'tl with a very quick movement. This downward movement of the main valve brings the piston (39 bclowla port 79 and establishes communication 'lStlK/VQUR the chamber 64 and thepipe 37. I

It will readily be understood that the duration of the blast. may be determined by the adjustment of the tripping linger '15. if this lingerbe adjusted to such position that only the extreme-point thereof contacts with the beveled ends of the hell crank levers 55, the blast will be of but a few seconds duration, while if this finger be adjusted to such position that practically the whole the beveled surface of the lower end thereof contacts with the beveled upper end of the bell crank lever 55, the blast will be of considerable duration. for the gear wheels lIZ'revolve at a comparatively slow rate of spoed. 'lhc lluid controlling valves herein set forth, are constructed to open so quickly, that the full force of the blast is received instantaneously at the nozzles. It .will

sewer readily be understood that it these valves opened slowly and blast reached the pile of cool gradually, wh le the comparatively weak flow of fluid would star the cool moving, it would not carry it to the rear portion of the fur 'ce, but said coal would bank up at the forward portion of said furnace. The quick 'openin of the valves herein set forth is a very important element in the successful operation of a device of this character. By referring to Fig. 1, it Will be seen that the trip lingers are arranged in such manner as to alternate the blasts at the furnaces. If these blasts occurred simultaneously, the force of the blast would be divided between the furnaces. By alternating the blasis the full force thereof is received at each furnace. When the trip linger 45 moves but of contact with the bell cranlc lever (see Fig. .3) the spring 7e acts to force the valve 73 upon its seat. This closes communication between the chamber 76 and theupper portion of the chamber 64. The minute ischarge opening '72 permits the escape of steam from e upper portion of the cesing de at this time. The pressure having been-removed from the upper side oi the piston the pressure upon the undcrof said piston, FLQtS'L'D return the main valve to the position indicated in Fig. 3 to thereby cut off the blast. it has been found that when the openings 21 are not provided in the portion 20 01' the coal receiving plate, a vacuum is iornied about said plate, which tends to destroy the direct action of! the blast ii: throwing the cord into the furnace. The provision of the openings 21 and 23 corrects this evil and permits direct undivcrted action of the blast. An opening 80 formed through the door immediately in the rear of the nozzles and on is with the jets thereof, pernro the mouth of the furnace steam and products of n red in the ire box.

understood that more than two by the devices herein shown iced, for it re: iires but the proper timing controlling valves to feed (actively as though only one fur- The position assumed by the red in dotted lines in 2, no it will be seen that the coal contained in e chute, forms an effective air seal to preserve the of the boile is desired to open the on, the slide ll} is shoved in e cool is then per the lower portion or opened. described feeding device opted for use with marine or stationary it may ruled in of the chute, after which rurna e :zry boil 's Whore plurality of furono furnac uulepeudcnly oi the it will also be soon lJi.1.'Lll 3 i without 1 thereof and that the duration nay be varied without affecting tin ed, it provides means for controlling should the blast devices fail for any in a. manner calculated to insure the best results. It is a Well known fact that means for preventing the emission of an excessive amount of smoke from stacks located in cities have been long sought. The even alternate iii-in ofthe boilers will in a large measure prevent such excessive amount of smoke, for at no time is u large quantity of green fuel thrown upon the fire.

The two doors indicatod'in Fig. 1, may lead to scpasame furnace or this latter condition When the blast devices herein are located upon opposite sides seen that onchalf of the lire will device herein shown and dc a further advantage in the fact that reason, the door of the furnace may be opened in the usual manner to per- Init the furnaces tobe fired Stoker's which completely close the front of the furnaces.

it. is to be understood that in the accompanying claims, the term plurality of furnaces may mean separate furnaces or 1111 e y may In eon furnaces fed through separate doors and which are in communication with each other.

A furnace feeding device embodying the principles of the invention is illustrated in Figs. 7 and 8, secured upon the plate which closes the mouth of one of the furnaces 9i of an culinary Scotch marine boiler. The door 92 of this furnace curri an unobstructed chute 93 vhicli receives fuel from a stationary chute 94 which is secured to the plate 90 by brackets 95. A slide 96 serves the same purpose in this form of the device that the slide 16 serves in the form illustrated in Fig. 2. The door 92 is hinged as at 97 to the plate 90 and is provided with the usual latch 98. The chute 93 is provided with a bottom 99 vhich receives the coalwhich passes through the chute. -r n opening 100 permits fluid under pressure from jets formed in a nozzle 101 to dis charge the fuel through said opening and into the furnacc. When it is desired to mount all of the parts0f this .ifurnaoe feeding device, upon the exterior of the furnace in the manner shown in Figs. 7 and S, zlc 101 swings ith the door when said door opcncd To accommodzite this swinging movement. of the 'noz- ZlOS, a. hinge joint ii)? is lornici'l in the pipe 10?. which "uctslluid under EHTPHSUIT: to the jets of the nozzle L '.i in that the structure provided in ms blc by zucicly substituttho ordinary door of the the noz f. terrace and by apply this dcvn o 1H7" manner.

produced by this device,

be in an incandescent state; in other Words,

by hand, thereby obviating z the delays occasioned by the breakage of parts in curing the brucl' ls in position, to I Expensive and complicated mechanism for feeding fuel to the mouth of the furnace, has been avoided in the present devic gravity alone has been relied upon to carry the fuel in front of the nozzles. lt w ill be seen that mostv oi the mechanism that is to be applied to the boiler proper, is carried by the door. By virtue of this construction the device may be readily applied to boilers already in use, by merely substituting this door for the old doors ol the urn-aces. This is a mailer oi importance Where the dismantling of a boiler may mean the closing of a large manufacturi?" j plant for aweeli or more.

While the elements herein shown and described are Well adapted to serve the purposes for which they are intended, it is to be understood thatcthe invention is not limited to the precise construction set forth, but includes Within itspurview such changes as may be made Within the scope of the appended claims.

What I claim, is:

1. The combination with a furnace, of a fuel receiving means, a blast device adapted to distribute the Euel from said fuel receiving means, means for admitting a blast fluid to said blast device, and means tor adjusting both the force and duration of said blast. 7

2. The combination with a furn ce, 01" a fuel receiving; means, a blast device adapted to di lbute incl from. said fuel receiving means, means for supplying a blast fluid to said blast device, and in ins or controlling both the duration and force 0i said l)l=1SiI, l;ll6' force of said blast being controllable indepeodcn tly of the duration thereof.

The combination with a furnace, of a fuel receiving means, a blast device adapted to distribute fuel from said fuel receiving means, means for supplying a blast fluid to said blast device, mean or controlling both 1 force and duralion of said blast, "the duration of. said blast being con trollable independently o the force thereoi.

i. The combination witu a furnace, of a blast device, a val for controlling the blast to said blast device, a rotafive member, trip member carried by said relative membur, and means ior adjus i 9; said trlpniernber.

5. The combination is: a in; race, of a blast Gevze,

a valve for controlling the blast to said blast device, a lo tative device, and a trip member carried by said rotative device and adapted to actuate the valve, said valve comprising means for causing the valve proper to move suddenly when the trip member acts.

l). The combination with a plurality of furnaces. of

blast devices located in said furnaces. valves controlling the blast to said blast devices, a motor, a plurality of roiative members act atcd by said motor, and a plurality of trip members carri by said rota tive members and adapted to alternately actuate the valves.

'1. The combination with a plurality of furnaces. of blast devices, valves controlling the blast to said blast devices, a motor, a plurality 01: re tive members actuated by said motor, and a plurality of. trip members carried by said to native members and adapted to alternately actuate the valves.

S. The combination with a furnace, of fuel receiving means located in said furnace, a plurality of blast jets adapted to distribute fuel from said fuel receiving means, means for conducting fluid to said jets, means for admitting the full force of said fluid to said jets instantaneously, means for controlling the force of the fluid through said means, and means for controlling the flow of fluid toeaen of the jets independently of the rest of said jets.

l). The combination with a furnace, of a normally unobstructed chute leading to said furnace, and fuel receiving means located in said furnace, means for adjusting the angle of said fuel receiving means, a blast device adapted to distribute fuel from said fuel receiving means, and auto matlc means for admitting the full force oi the blast to said blast device instantaneously.

10. The combination with a furnace, of a blast. device, and means for controlling the blast to said blast device, said means comprising a casing, a stem mounted in said casing, 21 rotative inen'iber, trip mechanism between said rotatlve member and said stem or intermittently actuating said stem, and members actuated by said stem which control'the new or the blast through said casing.

In testimony whereof I atilx my signature in preseneeot' two witnesses. 

